there r 2 groups of worker.. skilled n partially skilled. if both group work togather they nid 30 days to finish the job. if partially skilled worker can oni do 2/3 of the skilled worker did in a day. how many days needed if only partially skilled worker is workin to finish the job?
7 o, }: }6 W f% K2 K" T* VTVBNOW 含有熱門話題，最新最快電視，軟體，遊戲，電影，動漫及日常生活及興趣交流等資訊。A.50
* F# S% M: `: N4 N" zB.60tvb now,tvbnow,bttvb" l: g8 w, p8 Q* f* M
C.65tvb now,tvbnow,bttvb# D- l: O' n# j; H4 S" s2 j
D.75 |
發表於 2007-9-11 07:38 PM
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